Stockholders Equity - Narrative (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 08, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Stockholders Equity [Line Items]
Stock repurchase program, authorized amount		$ 4,000		$ 4,000
Shares repurchased		247	$ 149	$ 497	$ 419
Class A and Class B Common Stock
Stockholders Equity [Line Items]
Shares repurchased				14.0
Shares repurchased				$ 497
Remaining buyback authorization amount		$ 1,900		$ 1,900
Class A and Class B Common Stock | Subsequent Event
Stockholders Equity [Line Items]
Shares repurchased	1.4
Shares repurchased	$ 53
Class A Common Stock
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)		$ 0	$ 0	$ 0.24	$ 0.23
Class A Common Stock | Semi Annual Dividend | Subsequent Event
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)	$ 0.24
Class B Common Stock
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)		$ 0	$ 0	$ 0.24	$ 0.23
Class B Common Stock | Semi Annual Dividend | Subsequent Event
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)	$ 0.24